Net (Loss) Earnings Per Share (Computation Of Net (Loss) Earnings Per Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 30, 2011		Sep. 30, 2011		Jul. 01, 2011		Apr. 01, 2011		Dec. 31, 2010		Oct. 01, 2010		Jul. 02, 2010		Apr. 02, 2010		Dec. 30, 2011		Dec. 31, 2010		Jan. 01, 2010
Net (Loss) Earnings Per Share [Abstract]
Net (loss) earnings	$ (4.9)		$ (130.1)		$ (29.3)		$ (24.1)		$ (10.9)		$ 56.8		$ 64.1		$ 45.6		$ (188.4)		$ 155.6		$ 113.6
Denominator for basic net (loss) earnings per share - weighted average shares outstanding																	364.5		378.1		392.5
Employee stock options and restricted and performance stock awards																			4.6		1.7
Denominator for diluted net (loss) earnings per share - adjusted weighted average shares outstanding and assumed conversions																	364.5		382.7		394.2
Net (loss) earnings per share, basic	$ (0.01)	[1]	$ (0.36)	[1]	$ (0.08)	[1]	$ (0.07)	[1]	$ (0.03)	[1]	$ 0.15	[1]	$ 0.17	[1]	$ 0.12	[1]	$ (0.52)		$ 0.41		$ 0.29
Net (loss) earnings per share, diluted	$ (0.01)	[1]	$ (0.36)	[1]	$ (0.08)	[1]	$ (0.07)	[1]	$ (0.03)	[1]	$ 0.15	[1]	$ 0.16	[1]	$ 0.12	[1]	$ (0.52)	[2]	$ 0.41	[2]	$ 0.29	[2]
Anti-dilutive employee equity-based awards, excluded (in shares)																	23.2	[3]	18.5	[3]	31.5	[3]
Diluted weighted average shares outstanding in the absence of a loss																	367.6

[1] The per-share computation for the year is a separate, annual calculation. Accordingly, the sum of the quarterly per-share amounts does not necessarily equal the annual per-share amount.

[2] Dilutive securities are not included in the computation of diluted earnings per share when a company is in a loss position. As such, the numerator and the denominator used in computing both basic and diluted net loss per share for 2011 are the same. Diluted weighted average shares outstanding were 367.6 million in 2011.

[3] We exclude certain employee equity-based awards from the weighted average shares outstanding computation because the exercise price was greater than the average market price of the common shares; therefore, the effect would have been anti-dilutive.